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大气科学  2009 

云并合的初始位置探讨

DOI: 10.3878/j.issn.1006-9895.2009.05.12

Keywords: 数值模拟,单体并合,云团并合

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Abstract:

尽管很多云的并合过程最初是从云的中下部开始的(在这方面开展了大量研究),但我们在观测中发现也有相当数量的云并合过程最初是从云的中上部开始的(然而这方面的文献记载很少)。基于云并合对云降水过程演变的重要作用,本文从个例研究入手,利用中尺度数值模式WRF,模拟2005年5月17~18日发生在我国西南山区(主要以贵州省为主)的一次云并合过程。在整个云(系)的发展过程中,前后共经历了数十次并合。观测和模拟结果表明并合共经历了三个阶段:(1)对流云单体间并合形成较大的对流云;(2)对流云并合形成对流云团;(3)对流云团并合形成范围较大的降水云系。在此次个例中:第一和第二阶段的并合首先是从云的中下部开始的,往往是处于发展阶段的云发生并合;第三阶段的云并合却是从云的中上部开始的,往往是那些比较成熟的对流云团发生并合。两种并合机制截然不同,但都与风切变和云内的上升气流速度密切相关。本文系统阐述了两种不同的并合机制。

References

[1]  Ackerman B,Kennedy P C,On the merger of two small convective radar echoes,Annalen der Meteorolngie,1988(25).
[2]  Bennetts D A,Bader M J,Marles R H,Convective cloud merging and its effect on rainfall,Nature,1982(5887).
[3]  Carey L D,Rutledge S A,The relationship between precipitation and lightning in tropical island convection:A C-band polarimetric radar study,Monthly Weather Review,2000(08).
[4]  Chu C M,Lin Y L,Effects of orography on the generation and propagation of mesoscale convective systems in a two-dimensional conditionally unstable flow,Journal of the Atmospheric Sciences,2000(23).
[5]  Dornbrack A,Broadening of convective cells,Quarterly Journal of the Royal Meteorological Society,1997(540).
[6]  Fu D H,Guo X L,A cloud-resolving study on the role of cumulus merger in MCS with heavy precipitation,Advances in Atmospheric Sciences,2006(06).
[7]  付丹红.郭学良 积云并合在强对流系统形成中的作用 [J].-大气科学2007(04)
[8]  Jirak I L,Cotton W R,McAnelly R L,Satellite and radar survey of mesoscale convective system development,Monthly Weather Review,2003(10).
[9]  Knupp K R,Geerts B,Goodman S J,Analysis of a small,vigorous mesoscale convective system in a low-shear environment.Part h Formation,radar echo structure,and lightning behavior,Monthly Weather Review,1998(07).
[10]  Pozo D,Borrajero I,Marin J C,A numerical study of cell merger over Cuba--Part Ⅱ:Sensitivity to environmental conditions,Annales Geophysicae,2006(11).
[11]  Knupp K R,C-eerts B,Tuttle J D,Analysis of a small,vigorous mesoscale convective system in a low-shear environment.Part Ⅱ:Evolution of the stratiform precipitation and mesoscale flows,Monthly Weather Review,1998(07).
[12]  Lee B D,Jewett B F,Wilhelmson R B,The 19 April 1996 Illinois tornado outbreak.Part Ⅰ:Cell evolution and supercell isolation,Weather and Forecasting,2006(04).
[13]  Lee B D,Jewett B F,Wilhelmson R B,The 19 April 1996 Illinois tornado outbreak.Part Ⅱ:Cell mergers and associated tornado incidence,Weather and Forecasting,2006(04).
[14]  雷恒池.洪延超.赵震 近年来云降水物理和人工影响天气研究进展 [J].-大气科学2008(04)
[15]  Lin Y L,Farley R D,Orville H D,Bulk pararaeterization of the snow field in a cloud model,Journal of Applied Meteorology,1983(06).
[16]  Pozo D,Borrajero I,Matin J C,A numerical study of cell merger over Cuba--Part Ⅰ:Implementation of the ARPS/MM5 models,Annales Geophysicae,2006(11).
[17]  Rutledge S A,Hobbs P V,The mesoscale and microscale structure and organization of clouds and precipitation in midlatitude cyclones.Ⅻ:A diagnostic modeling study of precipitation development in narrow cloud-frontal rainbands,Journal of the Atmospheric Sciences,1984(20).
[18]  Simpson J,Westcott N E,Clerman R J,On cumulus mergers,Archly fur Meteorologie Geophysik und Bioklimatologie,1980(01).
[19]  Tian S C Effect of merging of the convective cloud dusters on occurrence of heavy rainfall [J].-Advances in Atmospheric Sciences1991(04)
[20]  Tao W K,Simpson J,Cloud interactions and merging:Numerical simulations,Journal of the Atmospheric Sciences,1984(19).
[21]  Westcott N E,Kennedy P C,Cell development and merger in an Illinois thunderstorm observed by Doppler radar,Journal of the Atmospheric Sciences,1989(01).
[22]  Westcott N E,Merging of convective clouds:cloud initiation,bridging,and subsequent growth,Monthly Weather Review,1994(05).

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